Table 2.
Parameter estimates, ICC, and MOR for models 1 and 2
| Case-mix variabless | OR (95% CI) | |
|---|---|---|
|
Model 1 (Case-mix only) |
Model 2 (Case-mix + hospital) |
|
| Female sex | 1.16 (1.13 to 1.19) | 1.16 (1.13 to 1.19) |
| Agea | 1.03 (1.03 to 1.03) | 1.03 (1.03 to 1.03) |
| English as primary language | 1.07 (1.01 to 1.12) | 1.07 (1.02 to 1.12) |
| Emergency department triage (“Urgent” or worse) | 2.25 (2.12 to 2.40) | 2.25 (2.12 to 2.40) |
| LBP without neurological signs and symptoms | 1.23 (1.13 to 1.35) | 1.23 (1.13 to 1.35) |
| Arrival at ED via ambulance | 4.37 (3.95 to 4.83) | 4.37 (3.94 to 4.83) |
| Presentation during working hours | 1.14 (1.09 to 1.19) | 1.14 (1.09 to 1.19) |
| Hospital peer-group | ||
| Principal referral (ref) | - | - |
| Major | - | 0.58 (0.39 to 0.86) |
| District | - | 0.25 (0.20 to 0.32) |
| Community | - | 0.40 (0.30 to 0.52) |
| Multi-purpose | - | 0.35 (0.26 to 0.46) |
| Sub-acute | - | 0.35 (0.49 to 2.57) |
| Ungrouped | - | 0.19 (0.08 to 0.46) |
| Intercept | 0.05 | 0.12 |
| Variance of random intercept | 0.55 | 0.39 |
| ICC (95% CI) | 0.14 (0.12 to 0.17) | 0.10 (0.08 to 0.13) |
| MOR | 2.03 | 1.81 |
ICC Intraclass correlation coefficient, MOR Median Odds Ratio, LBP Low back pain
aAge was centred around its mean